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ASTM A372 Grade K Steel vs. SAE-AISI 52100 Steel

Both ASTM A372 grade K steel and SAE-AISI 52100 steel are iron alloys. They have a very high 97% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is ASTM A372 grade K steel and the bottom bar is SAE-AISI 52100 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
180 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 23
10 to 20
Fatigue Strength, MPa 440
250 to 340
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
72
Shear Strength, MPa 490
370 to 420
Tensile Strength: Ultimate (UTS), MPa 780
590 to 2010
Tensile Strength: Yield (Proof), MPa 620
360 to 560

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 440
430
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 48
47
Thermal Expansion, µm/m-K 13
12 to 13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 4.4
2.4
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.8
1.5
Embodied Energy, MJ/kg 24
20
Embodied Water, L/kg 57
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
54 to 310
Resilience: Unit (Modulus of Resilience), kJ/m3 1010
350 to 840
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 27
21 to 72
Strength to Weight: Bending, points 24
20 to 45
Thermal Diffusivity, mm2/s 13
13
Thermal Shock Resistance, points 23
19 to 61

Alloy Composition

Carbon (C), % 0 to 0.18
0.93 to 1.1
Chromium (Cr), % 1.0 to 1.8
1.4 to 1.6
Iron (Fe), % 93.4 to 96.6
96.5 to 97.3
Manganese (Mn), % 0.1 to 0.4
0.25 to 0.45
Molybdenum (Mo), % 0.2 to 0.6
0
Nickel (Ni), % 2.0 to 3.3
0
Phosphorus (P), % 0 to 0.015
0 to 0.025
Silicon (Si), % 0.15 to 0.35
0.15 to 0.35
Sulfur (S), % 0 to 0.010
0 to 0.015